基于优先级抢占式调度（PBP，Priority Based and Preemptive）：系统中每个任务都有一个优 先级，内核总是将CPU 分配给处于就绪态的优先级最高的任务运行。
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Some commonly-used process mutex exclusive methods are analyzed in this paper. It advances a no preemptive method which is based on task priority and analyzes its security and high-efficiency.
本文分析了实时嵌入式操作系统中几种常用的进程互斥方法，尝试提出一种基于任务优先级的禁止抢占法，并分析了该方法的安全性和高效性。
And we analyze three task scheduling schemes based on this task set module, which include hybrid preemptive scheduling, priority-based grouping scheduling and FCFS scheduling.
在该任务模型上分析了二种任务调度机制，包括基于优先级的分组调度机制、混合抢占调度机制、FCFS调度机制。
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